40387766 has 4 divisors (see below), whose sum is σ = 60581652. Its totient is φ = 20193882.

The previous prime is 40387751. The next prime is 40387769. The reversal of 40387766 is 66778304.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40387769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10096940 + ... + 10096943.

It is an arithmetic number, because the mean of its divisors is an integer number (15145413).

Almost surely, 2^40387766 is an apocalyptic number.

40387766 is a deficient number, since it is larger than the sum of its proper divisors (20193886).

40387766 is a wasteful number, since it uses less digits than its factorization.

40387766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20193885.

The product of its (nonzero) digits is 169344, while the sum is 41.

The square root of 40387766 is about 6355.1369772807. The cubic root of 40387766 is about 343.0967549408.

The spelling of 40387766 in words is "forty million, three hundred eighty-seven thousand, seven hundred sixty-six".